Early in the beginning of the COVID-19 pandemic, scientists predicted the coronavirus would mutate slowly. They were wrong. Hundreds of thousands of viral mutations and multiple seasonal waves later, ...

As omicron subvariant BA.5 continues to drive the coronavirus’ spread in the United States, I’ve been thinking about what could come next. Omicron and its offshoots have been topping the variant ...

Mutations in the new coronavirus could reduce the effectiveness of vaccines against it. But vaccines themselves can also drive viral mutations, depending on exactly how the shots are deployed and how ...

Scientists studying the virus’s continuing evolution, and the body’s immune responses, hope to head off a resurgence and to better understand long Covid. By Apoorva Mandavilli Apoorva Mandavilli has ...

In the wake of findings that COVID-19 virus variants are more likely to spring from patients with weakened immune systems, leading medical experts are calling for heightened precautions in the ...

Mr. Quammen is a science writer and the author of the forthcoming book “Breathless: The Scientific Race to Defeat a Deadly Virus.” The Covid-19 pandemic has been a lesson in speed — the speed at which ...

As the coronavirus disease 2019 (COVID-19), caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), continues to wreak havoc globally, the virus's exact source remains unclear.